Day 16/part 2: C version.

day16/ex1.bash

@@ -5,7 +5,7 @@
 CMD=${0##*/}
 #shopt -s extglob
 
-declare -A valid=()
+declare -A VALID=()
 declare -i state=0 res=0
 
 while read -r line; do
@@ -13,7 +13,7 @@ while read -r line; do
 		n1=$(seq "${BASH_REMATCH[2]}" "${BASH_REMATCH[3]}")
 		n2=$(seq "${BASH_REMATCH[5]}" "${BASH_REMATCH[6]}")
 		for i in $n1 $n2; do
-			valid[$i]=1
+			VALID[$i]=1
 		done
 	elif [[ $line =~ (your ticket:|nearby tickets) ]]; then
 		((state++))
@@ -21,7 +21,7 @@ while read -r line; do
 		if ((state == 2)); then
 			for i in ${line//,/ }; do
 				# shellcheck disable=SC2100
-				[[ ! -v valid[$i] ]] && res=res+i
+				[[ ! -v VALID[$i] ]] && res=res+i
 			done
 		fi
 	fi